I have a list of words and a text file and I'd need to find out if any of the words on the list are found in the text file. In addition I'd need to replace those words with "DELETED" and save this file with another name.

I'm very new with Ruby and Python this all seems really hard. I kow I need to open the file and read it line by line. I konw how to check if the line includes one certain word but not if it includes one word from a list.

File.open("text.txt") do |x|
    x.each do |line|
        # WHAT TO PUT HERE?
    end
end

thank you in advance!

I have a list of words and a text file and I'd need to find out if any of the words on the list are found in the text file. In addition I'd need to replace those words with "DELETED" and save this file with another name.

I'm very new with Ruby and Python this all seems really hard. I kow I need to open the file and read it line by line. I konw how to check if the line includes one certain word but not if it includes one word from a list.

File.open("text.txt") do |x|
    x.each do |line|
        # WHAT TO PUT HERE?
    end
end

thank you in advance!

• ruby
• string
• list

• To see if a line contains a word in a list, go through the list and "check if the line includes [that] one certain word". – Scott Hunter Commented Mar 17 at 12:31

1 Answer 1

I would do something like this:

BLOCK_PATTERN = Regexp.union(["word_1", "word_2", "..."])  
INPUT_FILE    = "input.txt"  
OUTPUT_FILE   = "output.txt"  

File.open(OUTPUT_FILE, "w") do |output_file|  
  File.foreach(INPUT_FILE) do |line|  
    output_file << line.gsub(BLOCK_PATTERN, "DELETED")  
  end  
end